As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE OIL AIR VENT TUBE POSITIONED ALONG THE RT SIDE OF THE ENGINE WITH THE AFT END CURVED UPWARD INTO THE ENGINE EXHAUST AS TO AID THE VENTURI SECTION OF THE OIL AIR VENTING HAS A WELDED CLAMP SUPPORTED BY A STRAP HANGING FROM THE ENGINE TAILPIPE TO PREVENT TUBE ROTATION OUT OF THE GAS/EXHAUST PATH. THIS CLAMP IS ROUTINELY CRACKING DUE TO FATIGUE. NO TUBE ROTATION HAS OCCURRED 3RD FAILURE THIS AC.